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Published In: Bryologia Europaea 6: 146 (fasc. 62–64 Monogr. 16). 1855. (Bryol. Eur.) Name publication detail

Project Name Data (Last Modified On 3/22/2011)
Acceptance : Accepted
Project data     (Last Modified On 3/23/2011)

This species is separated from Andreaea rupestris by its smaller size, imbricate, obtuse leaves, the lack or weak expression of dorsal papillae, and its smaller, non-porose upper leaf cells. The taxon has been treated as a variety, subspecies or synonym of A. rupestris, but most recently Murray (1987) maintained it at the specific rank. In Central America A. alpestris appears distinctive, but it cannot be critically evaluated because it is known from only a few collections. Murray (1987) considered the Central American collections of A. alpestris misnamed but offered no opinion on their identity. The Central American species appear to agree in all particulars with her 1987 treatment of Andreaea alpestris.

Illustrations: Sharp (1936, Pl. 1 C); Bartram (1949, Fig. 3 D, as var. rupestris); Nyholm (1969, Fig. 453 a–aaa); Smith (1978, Fig. 30 8–9); Murray (1987, Fig. 9); Murray (1988, Fig. 24).
Habitat: Granitic rocks; 3000–4400 m.
Distribution in Central America:

GUATEMALA. Quezaltenango: Steyermark 34209 (F, FH); Totonicapan: Sharp 2640 (FH); San Marcos: Steyermark 35786 (F, FH). HONDURAS. Lempira: Allen 11510 (MO, TEFH). COSTA RICA. San José: Karlin 9006-0651 (MO).

World Range: Subarctic America, Eastern and Western Canada, Northwestern U.S.A.; Central America; Northern, Middle, and East Europe; Siberia, Soviet Far East.


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Andreaea alpestris (Thed.) Schimp. in B.S.G., Bryol. Eur. 6: 146. 1855. A. petrophila Ehrh. var. alpestris Thed., Bot. Not. 5: 79. 1849. A. rupestris Hedw. var. alpestris (Thed.) Sharp in Grout, Moss Fl. N. Amer. 1: 2. 1936. Type. Sweden, Thedenius.

Plants small, 1–2 cm high. Leaves without a whitish bloom, imbricate-appressed, lanceolate, concave, weakly cucullate above, somewhat constricted above the base, weakly panduriform, 0.5–1.0 mm long, apices straight, obtuse; margins erect somewhat incurved above; lamina unistratose or bistratose in streaks; ecostate; upper leaf cells irregularly short rectangular to quadrate or oval, 7–10 µm ×5 µm, firm-walled to incrassate, not pitted; lower leaf cells 12–30 µm × 7 µm, yellowish, long-rectangular, incrassate, pitted and sinuous; cells smooth or with low, weak dorsal papillae. Perichaetial leaves differentiated, sheathing, convolute. Sporophytes as in the genus. Spores not seen.

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